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From: Thomas Boussekey <[email protected]>
To: Paul Foerster <[email protected]>
Cc: Pgsql-General List <[email protected]>
Subject: Re: Moving from Linux to Linux?
Date: Tue, 11 Mar 2025 17:30:27 +0100
Message-ID: <CALUeYmfgCgoyAsvJWTDZvZ6ury9QDpn3NZSzH80CvzHLdWFCHg@mail.gmail.com> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>

Hello,

Le mar. 11 mars 2025 à 17:23, Paul Foerster <[email protected]> a
écrit :

> Hi,
>
> we are considering changing the PostgreSQL platform from SUSE SLE to Red
> Hat. To keep service interruptions as short as possible, the idea is to set
> up a streaming replication from the SUSE server to be replaced to a
> temporary Red Hat server and then replace that SUSE server with the newly
> setup Red Hat server.
>
> My idea is to set up a streaming replication for this. But this of course
> only works if the data files would be binary compatible.
>
It seems to be possible, see this conference talk:
https://youtu.be/LFHI58JCm0Q?si=EWeXrKmCURTz_VN-
They have performed a linux migration with physical replication, but there
are many pitfalls around!

I have performed the same kind of migration with logical replication and,
in my context, it was far easier!

>
> So, I wonder, if this is possible. We have a lot of databases, some of
> them need to be highly available and some are large too.
>
> Are there any obstacles that definitely make that a no-go? Do I risk
> corruption? It's both Linux, just a different distribution.
>
The version of the glibc binary seems to be a determining factor

>
> Cheers,
> Paul
>
> HTH, Thomas

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